Refractory material.



auras a. CAMPBELL, or SCOTTDALE, rmmsrnvanm.

v name-roar IATEBIAL.

1,1 14,446. No Drawing.

Specification of Letters Patent.

Patented Oct. 20, 1914.

To all whom it may concern:

Be-it known that I, Jane B. Caurnm, acitizen of the United States, residin at Scottdale, in the county of Westmore and and Stateof Pennsylvania, have invented certain new and'useful Improvements in Refractory Materials, of which the following is a specification. y invention is a new composition of matter, which is composed of calcined. flint clay, and asbestos fiber, mixed and ground in a wet pan, preferablv with small amounts of plastic clay, into a lastic mass and which is adapted for use in orm' and in repair ovens,- retorts and metallurgical -furnaces. A composition which has been found to give excellent results is:

Asbestos fiber .5 to 10. percent. Sufiicient plastic clay to make 100 per cent.

In makm my improved refractory lining materia s the amount of each of the Tam .'.1 100 percent.

in};' the refractory linings 0 doors for coke Calcined flint clay..- 80 to 99.5 percent.

Application!!! February 8, 1914. Serial No. 817,048.

40 while the asbestos fiber makes a dependable binder for the mass. The addition of plastic clay lessens the time required to grind the calcined clay so that it will bond itself, this time be'mg increased with a reduction in the amount of plastic clay used. In preparing my improved refractory lining material old fire clay brick may be and preferably is used to form the calcined flint clay .in the mixture, but when a supply of old it) fire clay brick is not available, new flint clay, at the expense of a slight increase in cost, may be employed.

In using the material, it is put in place in v the door frame or other location to which it is applied while plastic and is then dried.

I chum:

1. A refractory lining materialconsisting of a wet mixture of 85 per cent. calcined flint-clay, 14.5 per cent. plastic clay and .5 per cent. asbestos fiber.

2. A refractory lining material containing-at least per cent. calcined flint clay, up to 15 per cent. piastic clay and .5 to 10 per cent. asbestos fi r. 66

In testimony whereof, I have hereunto set my hand.

JAMES "R. CAMPBELL Jnssm S. Coox, G. F. Knmr. 

